Which of the following contributes significantly to food waste? Choose all that are correct.

A. Many people go to the store hungry, buy enough meat and vegetables to fill their refrigerator, but then throw some of it away when it spoils.

B. Fewer people eat all the parts of animals, leading to kidneys and feet being thrown in the trash.

C. Livestock such as pigs and cows are not fed food scraps but instead are fed crops specifically raised as feed (e.g., feed corn).

D. Lots of fruits and vegetables are discarded before reaching the market due to cosmetic imperfections.